V-Belt – Fits Volvo Penta AQ120-AQ170, 230A-251A Marine Engines (Replaces 831524, 834548, 958313, 966694)

Vendor: JLM Marine
Availability: In Stock
Product Type: Belt
$23.99
$23.99
Subtotal: $23.99

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V - Belt – Fits Volvo Penta AQ120 - AQ170, 230A - 251A Marine Engines (Replaces 831524, 834548, 958313, 966694) - JLM Marine Boat Parts Limited

V-Belt – Fits Volvo Penta AQ120-AQ170, 230A-251A Marine Engines (Replaces 831524, 834548, 958313, 966694)

$23.99

V-Belt – Fits Volvo Penta AQ120-AQ170, 230A-251A Marine Engines (Replaces 831524, 834548, 958313, 966694)

$23.99

V-Belt – Fits Volvo Penta AQ120-AQ170 & 230A-251A Marine Engines

This V-belt is designed for a wide range of Volvo Penta 4-cylinder gasoline inboard and sterndrive engines, including models from the AQ120 through AQ170 series and the 230A through 251A series, typically manufactured between the 1970s and 1990s.

It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring a precise fit for your engine's alternator system. Please cross-reference your part number with the table below to confirm compatibility.

  • Application: Alternator/Generator Belt for 35-amp systems.
  • Material: Durable synthetic rubber with high-strength reinforcement cords.
  • Installation Method: External engine accessory belt.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Volvo Penta 831524
Volvo Penta 834548
Volvo Penta 958313
Volvo Penta 966694
Sierra 18-4044
RECMAR REC966694

Compatible Engine Models

Confirm your engine model/year in the table below.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Volvo Penta AQ120B 120 4-Stroke 1970s–1980s 834548/966694
Volvo Penta AQ125A 125 4-Stroke 1970s–1980s 834548/966694
Volvo Penta AQ140A 140 4-Stroke 1970s–1980s 834548/966694
Volvo Penta AQ145A 145 4-Stroke 1970s–1980s 834548/966694
Volvo Penta AQ165A 165 4-Stroke 1970s–1980s 834548/966694
Volvo Penta AQ170A 170 4-Stroke 1970s–1980s 834548/966694
Volvo Penta AQ170B 170 4-Stroke 1970s–1980s 834548/966694
Volvo Penta AQ170C 170 4-Stroke 1970s–1980s 834548/966694
Volvo Penta BB140A 140 4-Stroke 1970s–1980s 834548/966694 Inboard version
Volvo Penta BB145A 145 4-Stroke 1970s–1980s 834548/966694 Inboard version
Volvo Penta BB165A 165 4-Stroke 1970s–1980s 834548/966694 Inboard version
Volvo Penta BB170A 170 4-Stroke 1970s–1980s 834548/966694 Inboard version
Volvo Penta BB170B 170 4-Stroke 1970s–1980s 834548/966694 Inboard version
Volvo Penta BB170C 170 4-Stroke 1970s–1980s 834548/966694 Inboard version
Volvo Penta MB10A 4-Stroke 834548/966694
Volvo Penta 230A 4-Stroke 834548/966694
Volvo Penta 230B 4-Stroke 834548/966694
Volvo Penta 250A 4-Stroke 834548/966694
Volvo Penta 250B 4-Stroke 834548/966694
Volvo Penta 251A 4-Stroke 834548/966694

Technical Specifications

Specification Value
Product Type V-Belt (Alternator/Generator Belt)
Installation External Engine Accessory
Fuel Type Gasoline
Dimensions Length: 1075 mm (42.3 inches)
Housing Material Synthetic rubber with high-strength cords
Other Technical Attributes For 35-amp alternator applications

Package Contents

  • 1 x V-Belt for Alternator (Replaces 831524, 834548, 958313, 966694)

Installation Guide

  1. Disconnect the boat's battery to prevent electrical hazards.
  2. Locate the alternator and identify the tensioner pulley or adjustment bolt.
  3. Loosen the alternator's mounting and adjustment bolts to release tension on the old belt.
  4. Carefully remove the old, worn V-belt from the pulleys.
  5. Inspect all pulleys for wear, damage, or misalignment before proceeding.
  6. Route the new V-belt around the crankshaft, water pump, and alternator pulleys, ensuring it is properly seated in the grooves.
  7. Apply tension to the belt by adjusting the alternator's position. Proper tension is typically a 1/2 inch (13mm) of deflection under moderate thumb pressure.
  8. Securely tighten the alternator's adjustment and mounting bolts.
  9. Reconnect the battery, then start the engine briefly to check for proper belt tracking and listen for any unusual noises.

Troubleshooting & FAQ

How can I be sure this V-belt fits my specific Volvo Penta engine?

Verify your engine model is listed in the 'Compatible Engine Models' table. Crucially, check that your engine uses one of the OEM part numbers this belt replaces: 831524, 834548, 958313, or 966694. This belt is specifically for systems with a 35-amp alternator.

What are the common signs that my alternator V-belt needs replacement?

Common signs include visible cracking, glazing, or fraying on the belt's surface. You may also hear a high-pitched squealing noise during engine operation, especially at startup or when under load, or notice your battery is not charging correctly.

How often should I replace my engine's V-belt?

There is no fixed replacement interval for all engines, but a routine inspection during annual service is recommended. Replace the belt proactively if it shows any signs of wear or damage, or as specified in your engine's service manual.

The length is 1075 mm. Is this the only dimension I need to worry about?

Length is the most critical dimension for fitment and proper tension. While width and profile are also important, this belt is manufactured to match the specific profile required for the listed Volvo Penta applications and replacement part numbers.

OEM vs. Aftermarket?

This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?

We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?

This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

  • Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
  • This product is an aftermarket replacement part and is not an OEM component.
  • Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

  • Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
  • Fast Global Shipping: Free delivery worldwide in 5–15 days.
  • Direct from Manufacturer: Competitive pricing without compromising quality.

We can ship to virtually any address in the world with free shipping available for most regions.

For our typical US and Canadian customers , our shipping timeframes are as follows:

  • Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
  • US warehouse shipment: orders will be delivered within 5 days after placing the order.
  • China warehouse shipment: orders will be delivered about 12 days after placing the order.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.

As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.

We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.

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